Hi list, I saw this in my logs:
Apr 29 14:58:08 mx postfix/smtpd[4880]: connect from xxx.yyy.zzz[xxx.yyy.zzz.xxx] Apr 29 14:58:09 mx postfix/smtpd[4880]: warning: valid_hostname: empty hostname Apr 29 14:58:09 mx postfix/smtpd[4880]: warning: malformed domain name in resource data of MX record for somedomain.com: Apr 29 14:58:09 mx postfix/smtpd[4880]: NOQUEUE: reject: RCPT from xxx.yyy.zzz[xxx.yyy.zzz.xxx]: 450 4.1.8 <i...@somedomain.com>: Sender address rejected: Malformed DNS server reply; from=<i...@somedomain.com> to=<u...@example.com> proto=ESMTP helo=<xxx.yyy.zzz> Apr 29 14:58:09 mx postfix/smtpd[4880]: disconnect from fxxx.yyy.zzz[xxx.yyy.zzz.xxx] And: $ host somedomain.com somedomain.com has address yyy.zzz.xxx.yyy somedomain.com mail is handled by 0 . This looks like a Null MX record: http://tools.ietf.org/html/draft-delany-nullmx-00 If the domain owner declares that this domain never sends or recieves email, then shouldn't postfix reject the above message with a permanent error? TIA, Mikael Bak
